Lubricator



(No Model.) Y

A. C. ELLITHORPE.

LUBR'IGATOR.

110.452,101. Patented May 12,1891.

1w 1111 Wl.:

'HIIIIII UNiTnn STATES PATENT Prien.

ALBERT C. ELLITHORPE, OF CHICAGO, ILLINOIS.

LUBRICATOR.

SPECIFICATION forming part of Letters Patent NO. 452,101, dated May 12, 1891.

Application led February 6, 1891. Serial No. 380,409. (No model.)

.To all whom it may concern:

Be it known that I, ALBERT C. ELLITHORPE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Lubricators; and I do declare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to an improvement in devices forlubricating the inner walls of hydraulic and other cylinders, and the novelty will be fully understood from the following description and claims, when taken in connection with the accompanying drawing, in which the iigure illustrates a hydraulic cylinder, partly in section, and also the piston head and rod with my improvements applied. Before describing the details of construction, I desire to say that heretofore it has been the practice in lubricating the piston-heads of steam and vapor engines to tap one of the walls of such cylinders and arrange a cup containing lubricant over such hole, so that the lubricating material may pass into and upon the periphery of the piston-head, and in some cases a cock or valve has been provided for regulating the flow of the lubricant from the cup to the piston-head. By these devices the oil or other lubricant is not forced against the inner wall of the cylinder, but against the piston-head, and is objectionable, first, for the reason that the forward and backward strokes of the piston when moving rapidly has a tendency to drive the oil back into the cup or holder instead of drawing itinto the cylinder, and, secondly, in that the point of entrance being fixed, as the piston-head'passes such point the opening will be uncovered and the lubricant wasted.

As another means of lubricating the cylinders7 it has been proposed to employ a hollow piston and to drill holes in the piston-head running from the hollow rod out to the periphery of the head and then feed the lubricant through the piston-rod and discharge it through the channels in the head into the cylinder. This mode is expensive and very objectionable, inasmuch as the piston head and rod must be of a special construction, which is difficult to make as well as being very Weak,

and when any part of the rod or head becomes impaired or injured the lubricating device as well becomes useless. By my improvements all of these objections are obviated and I have a lubricating device which may be attached to the head and rod of any piston, such as at present in use at a comparatively small expense.

Referring by letter to said drawing, A indicates a hydraulic cylinder having one end open and which may be of any ordinary or approved construction.

B indicates the piston, which may also be of the ordinary construction, and C indicates the piston-head. This head may be of any suitable construction, although I prefer to makeit of the parts a, b, and c, the parts or sections a and b overlapping eachother, as shown, and connected by bolts d and nuts or other suitable fastening devices. The section l? of the head is provided with a circumferential grease-groove e. The outer circumferential edge of the section b is beveled, and the adjacent edge of the sect-ion c is correspondingly beveled, as shown at f, to receive a wiper.

D indicates the grease holder or cup. This holder is fixed on the piston-rod at asufficient distance from the cylinder to allow said rod to make a full stroke without striking the cup against the open end of the cylinder. The cup is preferably of a cylindrical form, with an open top and tapering opening g in its bottom.

E indicates a cap or cover for the greasecup. This cup is 4provided with a central screw tapped opening h and receives a threaded rod F, which carries at its upper end a handle or wheel t and at its opposite end a follower 7o, which plunges in the cup and is designed to force the grease therefrom to the piston-head, as will be presently explained.

G indicates a pipe,which is designed to convey the grease or other lubricant from. the

cup or holder to the piston-head, and said pipe, together with the cup, moves with the piston and is ixed to the rod. This pipe, which is arranged outside of and along the piston-rod, is connected at one end with the screw-tapped aperture in the grease-cup by an elbow-coupling Z, and its opposite .end also carries a similar coupling m, f rom which leads IOO is given motion the entire inner Wall of the cylinder will be lubricated.

Having described my invention, what I claim is l. The combination, with a cylinder and a piston-head having a circumferential groove,

of a grease cup or holder movable with the piston, and a pipe arranged on the outside of the piston-rod and leading from the bottom of the grease-cup to the groove in the pistonhead, substantially as specified.

2. The combination, with a piston-rod, ol' a head having a circumferential groove, a grease-cup having a plunger, and a pipe arranged on the outside of the rod and connecting the cup with the grease-groove in the head, substantially as speeied.

In testimony whereof I affix my signature in presence of two Witnesses.

ALBERT C. ELLITHORPE.

XVitnesses:

HERMAN FROUMEL, SMIL. ASHTON. 

